Pretty much the best quality version of the animated intro from the 2 hour + The Grateful Dead Movie from 1977 I can find on the web. It was created by Gary Gutierrez who “had already apprenticed at John Korty’s Mill Valley studio as an animator of children’s films, creating and directing live action and animation for “Sesame Street” and “The Electric Company,” before working on the Dead’s animated sequence. He continued working withe band on various projects of theirs, including the surreal title sequence for the CBS revival of “The Twilight Zone” television series (1985), for which (Jerry) Garcia composed the score.” *

* Info from www.nightflight.com

UPDATE: There’s a good minute of the intro in very high quality over on Vimeo on the trailer for the film.